Position is crucial? [Pokémon XD] Note these are double battles! Shadow must be lower level than rest of team to qualify? Not too sure the actual calculation... What is noted is that single battles are half the payout. Typically recording double battle payout on the prize money article.

level+1

level+3

* - follows the normal game style that the last member gives the payout
** - super complicated

Note a few things: there are many Trainer classes that do not have "payouts" in the traditional sense (see Guy as an example); they are instead calculated based on colosseum payouts (e.g. Phenac Stadium).

For instance: the payout for Teacher is not known in Round 3 of Phenac Stadium, but the payouts for Lady, Fun Old Man, and Athlete are known. From calculations done with Round 1 where all payouts are known, the final payout is double the payouts of all Trainers in the round. In Round 3, the total payout is 8832, so dividing that value by two, then subtracting the payouts*level of Lady, Fun Old Man, and Athlete, and finally dividing by the maximum level (as it seems that's what Colosseum does, though even that rule is not a hard and fast rule: see Pyrite Colosseum as an example) will provide the actual payout of Teacher. If you're curious, talk to me directly.